We report two experiments during which participants conversed with either a confederate (Experiment 1) or a close friend (Experiment 2) while tracking a moving target on a computer screen. In both experiments, talking led to worse performance on the tracking task than listening. We attribute this finding to the increased cognitive demands of speech planning and monitoring. Growth Curve Analyses of task performance during the beginning and end of conversation segments revealed dynamical changes in the impact of conversation on visuomotor task performance, with increasing impact during the beginning of speaking segments and decreasing impact during the beginning of listening segments. At the end of speaking and listening segments, this pattern reversed. These changes became more pronounced with increased difficulty of the task. Together, these results show that the planning and monitoring aspects of conversation require the majority of the attentional resources that are also used for non-linguistic visuomotor tasks. The fact that similar results were obtained when conversing with both a confederate and a friend indicates that our findings apply to a wide range of conversational situations. This is the first study to show the fine-grained time course of the shifting attentional demands of conversation on a concurrently performed visuomotor task.

Context and prosody are the main cues native-English speakers rely on to detect and interpret sarcastic irony within spoken discourse. The importance of each type of cue for detecting sarcasm has not been fully investigated in native speakers and has not been examined at all in adult English learners. Here, we compare the extent to which native-English speakers and Arabic-speaking English learners rely on contextual and prosodic cues to identify sarcasm in spoken English, situating these findings within current cross-linguistic effects literature. We show Arabic speakers utilize the cues to a different extent than native speakers: they tend not to utilize prosodic information, focusing on contextual semantic information. These results help clarify the relative weight of contextual and prosodic cues in native-English speakers and support theories that suggest that prosody and emotion could transfer separately in second language learning such that one could transfer while the other does not.

The choice and processing of referential expressions depend on the referents' status within the discourse, such that pronouns are generally preferred over full repetitive references when the referent is salient. Here we report two visual-world experiments showing that: (1) in spoken language comprehension, this preference is reflected in delayed fixations to referents mentioned after repeated definite references compared with after pronouns; (2) repeated references are processed differently than new references; (3) long-term semantic memory representations affect the processing of pronouns and repeated names differently. Overall, these results support the role of semantic discourse representation in referential processing and reveal important details about how pronouns and full repeated references are processed in the context of these representations. The results suggest the need for modifications to current theoretical accounts of reference processing such as Discourse Prominence Theory and the Informational Load Hypothesis.

The study of spoken language requires controlling multiple aspects of the speech signal. Here we report a procedure to create a sarcastic version of sincerely spoken audio stimuli by changing aspects of prosody relevant to sarcasm (pitch, pace, and loudness) while controlling all other acoustic differences. Two rating experiments validated the efficacy of this procedure for spoken conversations ("Maybe they are more delicate than you realized") and descriptions ("Angie thanked John for doing such a great job"; emphasis indicates manipulation).